CVE-2023-40548 Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems

A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This fl...

CVE-2023-40548

A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This fl...

CVE-2023-40548 Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems

A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This fl...

CVE-2023-40548

CVE-2023-40548 is a Shim (boot shim) vulnerability affecting 32-bit Shim, where an addition of a user-controlled PE-derived value used for memory allocation causes a heap-based buffer overflow, leading to memory corruption and potential crash during boot. The issue is described specifically for 3...

Red Hat Shim Security Breach

Red Hat Shim is a simple software package from Red Hat. It is intended to be used as a first-stage boot loader on UEFI systems. A security vulnerability exists in Red Hat Shim. An attacker exploiting this vulnerability could cause memory corruption and possibly lead to a bootstrap crash or data...

Huawei EulerOS: Security Advisory for shim (EulerOS-SA-2024-1129)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Huawei EulerOS: Security Advisory for shim (EulerOS-SA-2024-1113)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Red Hat Shim Security Breach

Red Hat Shim is a simple software package from Red Hat. It is intended to be used as a first-stage boot loader on UEFI systems. A security vulnerability exists in Red Hat Shim that stems from an out-of-bounds read issue, which could result in the exposure of sensitive data during the system boot...

The vulnerability of the UEFI loader’s shim, which exists due to the lack of measures taken to neutralize special elements, allows a hacker to execute arbitrary code.

The vulnerability of the UEFI loader “shim” exists due to the failure to implement measures to neutralize certain components. Exploiting this vulnerability allows a remote attacker to execute arbitrary code by sending a specially crafted HTTP request...

EulerOS 2.0 SP11 : shim (EulerOS-SA-2024-1113)

According to the versions of the shim packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow. Impact summary...

EulerOS 2.0 SP11 : shim (EulerOS-SA-2024-1129)

According to the versions of the shim package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow. Impact summary:...

CVE-2023-40546

A flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create the new variable, it tries to print an error message to the user; however, the number of parameters used by the logging function doesn't match the format string used by it, leading to a cras...

CVE-2023-40550

An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase...

CVE-2023-40549

An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service. Mitigation There's no available mitigati...

AZL-35278 CVE-2023-40547 affecting package shim-unsigned-x64 for versions less than 15.8-3

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete...

AZL-33895 CVE-2023-40547 affecting package shim-unsigned-x64 for versions less than 15.8-1

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete...

AZL-35267 CVE-2023-40547 affecting package shim-unsigned-aarch64 for versions less than 15.8-3

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete...

AZL-34030 CVE-2023-40547 affecting package shim for versions less than 15.8-1

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete...

AZL-35254 CVE-2023-40547 affecting package shim for versions less than 15.8-3

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete...

DEBIAN-CVE-2023-40547

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete...